Prediction in the Dynamics and Spoilage of Shewanella putrefaciens in Bigeye Tuna (Thunnus obesus) by Gas Sensors Stored at Different Refrigeration Temperatures

Shewanella putrefaciens have a faster growth rate and strong spoilage potential at low temperatures for aquatic products. This study developed a nondestructive method for predicting the kinetic growth and spoilage of S. putrefaciens in bigeye tuna during cold storage at 4, 7 and 10 °C by electronic nose. According to the responses of electronic nose sensor P30/2, the fitted primary kinetic models (Gompertz and logistic models) and secondary model (square root function model) were able to better simulate the dynamic growth of S. putrefaciens, with high R2 and low RMSE values in the range of 0.96–0.99 and 0.021–0.061, respectively. A partial least squares (PLS) regression model based on both electronic nose sensor response values and electrical conductivity (EC) values predicted spoilage of S. putrefaciens in bigeye tuna more accurately than the PLS model based on sensor signal values only. In addition, SPME/GC-MS analysis suggested that 1-octen-3-ol, 2-nonanone, 2-heptanone, dimethyl disulfide and methylamine, N, N-dimethyl- are the key VOCs of tuna inoculated with S. putrefaciens.

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Comparison of Physicochemical Changes and Water Migration of Acinetobacter johnsonii, Shewanella putrefaciens, and Cocultures From Spoiled Bigeye Tuna (Thunnus obesus) During Cold Storage

Frontiers in Microbiology ◽

10.3389/fmicb.2021.727333 ◽

2021 ◽

Vol 12 ◽

Author(s):

Xin-Yun Wang ◽

Jing Xie

Keyword(s):

Cold Storage ◽

Thiobarbituric Acid ◽

Shewanella Putrefaciens ◽

Water Dynamics ◽

Water Migration ◽

Bigeye Tuna ◽

Acinetobacter Johnsonii ◽

Physicochemical Changes ◽

Low Field ◽

Thunnus Obesus

This study investigates the physicochemical changes and water migration of Acinetobacter johnsonii (A), Shewanella putrefaciens (S), and cocultured A. johnsonii and S. putrefaciens (AS) inoculated into bigeye tuna during cold storage. The physicochemical indexes [fluorescence ratio (FR), total volatile base nitrogen (TVB-N), thiobarbituric acid (TBA), trimethylamine (TMA), peroxide value (POV), and pH] of bigeye tuna increased cold storage. A significant decrease in trapped water was found in the AS samples, and direct monitoring of the water dynamics was provided by low-field nuclear magnetic resonance. Samples inoculated with A. johnsonii and S. putrefaciens also induced the degradation of myofibrillar proteins and weakness of some Z-lines and M-lines. Higher values of physicochemical indexes and water dynamics were shown in the coculture of S. putrefaciens and A. johnsonii than in the other groups. Therefore, this paper reveals that the coculture of A. johnsonii and S. putrefaciens resulted in a bigeye tuna that was more easily spoiled when compared to the single culture. This study provides insight into the spoilage potential of A. johnsonii and S. putrefaciens during cold storage, which further assists in the application of appropriate technologies to keep the freshness of aquatic foods.

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Assessment of spoilage potential and amino acids deamination & decarboxylation activities of Shewanella putrefaciens in bigeye tuna (Thunnus obesus)

LWT ◽

10.1016/j.lwt.2021.113016 ◽

2021 ◽

pp. 113016

Author(s):

Zhengkai Yi ◽

Jing Xie

Keyword(s):

Amino Acids ◽

Shewanella Putrefaciens ◽

Bigeye Tuna ◽

Thunnus Obesus

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QUANTIFICATION OF TUNA FISH TARGET STRENGTH USING QUANTITATIVE ECHO SOUNDER

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v1i1.7936 ◽

2009 ◽

Vol 1 (1) ◽

Author(s):

Henry M. Manik

Keyword(s):

Wave Reflection ◽

Fork Length ◽

Research Programme ◽

Yellowfin Tuna ◽

Target Strength ◽

Bigeye Tuna ◽

Tuna Fish ◽

Thunnus Obesus ◽

The Relationship ◽

Echo Sounder

A preliminary research programme was carried out in order to study the acoustic wave reflection or target strength (TS) of tuna fish using a quantitative echo sounder (QES). The relationships between TS to fork length (FL) and swimbladder volume, for bigeye tuna (Thunnus obesus) and yellowfin tuna (T. albacares) are investigated. The TS of bigeye tuna was about 3 dB higher than yellowfin tuna when comparing species at the same size. The result can be correlated to the swimbladder volume differencebetween species. The relationship between TS and swimbladder volume was quantified for both species.Keywords: tuna fish, target strength, quantitative echo sounder

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Vertical distribution of bigeye tuna Thunnus obesus in the tropical Indian Ocean

Journal of Fishery Sciences of China ◽

10.3724/sp.j.1118.2013.00660 ◽

2013 ◽

Vol 20 (3) ◽

pp. 660-671 ◽

Cited By ~ 1

Author(s):

Xuezhong CHEN ◽

Shenglong YANG ◽

Yu Zhang ◽

Wei FAN ◽

Yumei WU

Keyword(s):

Indian Ocean ◽

Vertical Distribution ◽

Tropical Indian Ocean ◽

Bigeye Tuna ◽

Thunnus Obesus

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Smells Like Teen Spirit—A Model to Generate Laundry-Associated Malodour In Vitro

Microorganisms ◽

10.3390/microorganisms9050974 ◽

2021 ◽

Vol 9 (5) ◽

pp. 974

Author(s):

Marc-Kevin Zinn ◽

Marco Singer ◽

Dirk Bockmühl

Keyword(s):

Volatile Compounds ◽

Micrococcus Luteus ◽

Dimethyl Disulfide ◽

Bacterial Strains ◽

Dimethyl Trisulfide ◽

Model Based ◽

Washing Machines ◽

Staphylococcus Hominis

Although malodour formation on textiles and in washing machines has been reported to be a very relevant problem in domestic laundry, the processes leading to bad odours have not been studied intensively. In particular, the smell often described as “wet-and-dirty-dustcloth-like malodour” had not been reproduced previously. We developed a lab model based on a bacterial mixture of Micrococcus luteus, Staphylococcus hominis, and Corynebacterium jeikeium, which can produce this odour type and which might allow the detailed investigation of this problem and the development of counteractions. The model uses bacterial strains that have been isolated from malodourous textiles. We could also show that the three volatile compounds dimethyl disulfide, dimethyl trisulfide, and indole contribute considerably to the “wet-fabric-like” malodour. These substances were not only found to be formed in the malodour model but have already been identified in the literature as relevant malodourous substances.

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Differences in lipid composition of Bigeye tuna (Thunnus obesus) during storage at 0 °C and 4 °C

Food Research International ◽

10.1016/j.foodres.2021.110233 ◽

2021 ◽

Vol 143 ◽

pp. 110233

Author(s):

Xin-Yun Wang ◽

Jing Xie ◽

Xin-Jun Chen

Keyword(s):

Lipid Composition ◽

Bigeye Tuna ◽

Thunnus Obesus

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Fuzzy logic analyses for the spawner-recruitment relationship of bigeye tuna (Thunnus obesus) in the Indian Ocean incorporating the environmental regime shift

Ecological Modelling ◽

10.1016/j.ecolmodel.2005.11.049 ◽

2007 ◽

Vol 203 (1-2) ◽

pp. 132-140 ◽

Cited By ~ 2

Author(s):

Tom Nishida ◽

Ding-Geng Chen ◽

Masahiko Mohri

Keyword(s):

Fuzzy Logic ◽

Indian Ocean ◽

Regime Shift ◽

Bigeye Tuna ◽

Environmental Regime ◽

Thunnus Obesus ◽

The Indian Ocean ◽

Relationship Of

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Size-specific spatiotemporal dynamics of bigeye tuna (Thunnus obesus) caught by the longline fishery in the eastern Paciﬁc Ocean

Fisheries Research ◽

10.1016/j.fishres.2021.106065 ◽

2021 ◽

Vol 243 ◽

pp. 106065

Author(s):

Keisuke Satoh ◽

Haikun Xu ◽

Carolina V. Minte-Vera ◽

Mark N. Maunder ◽

Toshihide Kitakado

Keyword(s):

Pacific Ocean ◽

Spatiotemporal Dynamics ◽

Eastern Pacific ◽

Longline Fishery ◽

Bigeye Tuna ◽

Eastern Pacific Ocean ◽

Thunnus Obesus

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Age and growth estimation of bigeye tuna, Thunnus obesus (Teleostei: Scombridae) in the southwestern Atlantic

Neotropical Ichthyology ◽

10.1590/s1679-62252012000100014 ◽

2012 ◽

Vol 10 (1) ◽

pp. 148-158 ◽

Cited By ~ 7

Author(s):

Paulo Duarte-Neto ◽

Fábio M. Higa ◽

Rosangela P. Lessa

Keyword(s):

Fork Length ◽

Age And Growth ◽

Data Uncertainty ◽

Bigeye Tuna ◽

Western Atlantic ◽

Thunnus Obesus ◽

Marginal Increment ◽

Back Calculation ◽

Growth Estimation ◽

Averaged Model

The purpose of the current study was to supply the first information on age and growth for Thunnus obesus caught in the equatorial south-western Atlantic using dorsal spines, an approach that has been successfully employed for ageing tuna species. The study was conducted using a multi-model inference based on information theory for back-calculated and observed length-at-age data. Uncertainty associated with the parameter estimation was verified and results were compared to other accounts on the species, considering both the statistical and methodological contexts. Samples were collected in Natal city (Rio Grande do Norte State, Brazil) from February 1999 to January 2000, of tuna vessels and from surveys, aimed at providing information on the Brazilian Exclusive Economic Zone (EEZ) in the area around São Pedro and São Paulo Archipelago. Validation using marginal increment indicated that one ring is deposited per year. Mean length-at-age ranged of 54.3 to 177.5 cm (fork length) for ages 1 to 9 years. Von Bertalanffy, Richards, and Gompertz models were considered suitable for the bigeye tuna. Hence, the model-averaged asymptotic length ¯L∞ was estimated. The averaged model generated in the present study by back-calculation was considered appropriate for describing the growth of T. obesus.

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